Gas-tightening devices for oven doors



May 15, 1956 F. J. F. BARBAS 2,745,399

GAS-TIGHTENING DEVICES FOR OVEN DOORS Filed Jan. 9. 1952 4 Sheets-Sheet l i /rvvE/vToR j 6 5 7 FE1/X JEAN FRANa/S BARBAS Arron/vars May 15, 1956 F. J. F. BARBAS GAS-TIGHTENING DEVICES FOR OVEN DOORS Filed Jan. 9, 1952 FEL/x .HAN FRANo/s .9A/BAS 4 Sheets-Sheet 2 INVENTOR Ar'romvfys F. J. F. BARBAS 2,745,399

GAS-TIGHTENING DEVICES FOR OVEN DOORS May 15, 1956 4 Sheets-Sheet 3 Filed Jan. 9, 1952 n .UA

l/VVENTOR AT TURNEYS May 15, 1956 F. J. F. BARBAS 2,745,399

GASJIGHTENING DEVICES FOR OVEN DOORS Filed Jan. 9, 1952 4 Sheets-Sheet 4 /NVE/VTOR ffl/X Jf/m FRA/vo/s BARE/4s ATTRNEYS United dtates GAS-TIGHTENING'DEWCES FR OVEN DOORS Felix .lean Franois Barbas, Paris, France Application January 9, 1952, Serial No. 265,669

Claims priority, application France -.anuary-9, 1951 Claims. (Cl. 126-190) This invention relates to gas-tightening devices for oven doors.

The object of the present invention is to provide a sealing means around an oven aperture which is combination with a sliding door for said aperture will hermetically seal said closure when said door is closed for preventing loss of heat or gases from said oven.

A further object of the present invention is to provide a slidable door for opening and closing over apertures including owable sealing means around said aperture and alongside said door which means is retained in its sealing position regardless of the position of said door.

A sealing device according to the invention comprises, in combination, about the aperture to be closed, a permanent and uninterrupted chainv of tightening material which may be housed in channels of any suitable shape provided about said aperture; on the door of said aperture, on the one hand, closing elements extending below said door with respect to the direction in which it opens and closing hermetically the portions of the aforesaid chain or" tightening material that are parallel to that direction (whether the door is open or closed), and, on the other hand, closing elements which close the other 2 mum opening height of the door and a suicient safety height (such as a few cm.).

Packing boxes may be provided in the path of the vertical gas-tightening elements, on the travel of their prolongations.

As a tightening material, the following may be used (l) if a comparative tightness is desired in the vertical portions of the fixed channels, a suitable movable, pulverulent or granular material, such as sand, plaster, kieselguhr or the like, or a mixture of these; and, in the horizontal portions of said ixed channels, a similar material or a pasty material, heat resistant, such as a plastic lubriicating material, grease or the like, or a liquid substance, such as a high combustion point oil.

(2) if aperfect tightness is desired in the vertical portions of the lixed channels, a pasty material; and, in

the horizontal portions of said channels, a pasty or liquid substance.

Actually, the provision in said channels of a granular or pulverulent material `produces a substantial loss'inl the leakage of the gas, whereby a comparative tightness is in dash-and-dotted lines. Fig. 4 isV a semi-elevational view of an oven'aperture, -I provided with a door opening unwardly and slightly open..

portions of said chain, which are horizontal in the present case, when the door is closed only. The sections of the xed channels provided about the aperture of the oven may be U- or V-shaped or otherwise. And the horizontal portions of said channels can normally be completely open when the door is open. While the vertical portions of said channels can be normally partly closed by xed flexible or rigid plates, and in such a case, the corresponding movable members, integral with the door, may be sliding plates, in close frictional relation with said iixed plates, closing hermetically the free space formed between their edges and constantly preventing the tightening material from falling out of said channels, whether the door is closed or open.

As regards the vertical portions of the gas-tightening chain channels, their closing is then permanently ensured by sliding plates, moving with the door, before the front openings of these portions ofsaid channels.

As regards the horizontal portions of the gas-tightening chain channels, their closing can be ensured by making the movable closing parts, integral with the door, penetrate inside the gas-tightening material filling said channels, but only when the door is shut as when the door is open, said horizontal channels keep open.

lt should be pointed out that the Vertical portions of the xed channels of the gas-tightening chain must have a bottom adapted to retain the tightening material they contain.

it should also be pointed out that the prolongations of the vertical movable closing parts, integral with the door of the oven, in order to always ensure a satisfactory tightness on the sides of the aperture of the oven, will preferably have a length equal to the sum of the height of the corresponding vertical channels, the maxiobtained, while a pasty substance in a channel prevents'any` gas frornpassing through, Ythe result thereof being an absolute tightness. I

ln the attached drawings, various embodiments of the invention have been illustrated by Yway of example, which are in no way limitative.

ln the drawings:

Fig. l is an elevational view of the fixed portions 'of a vertical tightening channel with its tlexible plates.' Fig. 2 is a side-view ot' said Ycomplete channel providf ing a tight side contact with a sliding plate integralhwith the door, which has been supposed to be slightly opere?L Fig; 3 is a sectional view along AA of Fig. l, in which the slidingplate and a portion of the door are shown Fig. 5is a sectional view along BB of Fig. 4.v v n 'l Fig. 6 is a plan view of the aperture of the oven, wthfV out the door, in which lthe tlexibleplates are not shown Fig. 7 is a sectional view along CC of Fig. 4,.

Fig. 8 is a plan viewV of a sliding plate packing box@ and, above, asectional View thereof along DD.

Fig.;9 is a perspective view'of a portion. of'thel` (in which whole-ofthe Xed part of the tightening device the exible plates are not shown).

Fig. l0 is a perspective View of the door with the movable part of the tightening device;

Fig. ll is a perspective view of a gas tightening device mounted upon an oven in accordance with the .pres-1 ent invention. y

Figs. l to 3 show aA vertical tightening .channel 1 pro-vvided on each side or". the aperture of the oven', the

fixed walls 2 of which have, in front thereof, 'fieible plates 3 forming between their free edges a longitudinali" opening or mouth-4 ((1,11, c, d, on Fig. l). ing can be closed by a Said opening channel i.

on the drawings).

contact is constantly ensured between the tiled wallsr 2 door. t 1 A slot 8 (Figs. 2, 3 and f6) Yis made in the-bottom,

of the vertical channel providing a passage for the- .i

Patented May 15, 195s` provided sliding plate (Figs 2, 3 to 8 v '1 and lll) integral with the door 6 in its sliding motion which forms the movable' part of the vertical tighten- Said channel l has a bottom 7 making t v it possible to fill it with a movable material (not shown.` u When the movable plate 5' moves,"w: it slides along the fixed flexible plates 3, whereby a tight l 3; lower'. prolongation of vthe sliding plate' 5 extending below the door 6, Yas shown specially on Figs. 4, 7 and ,10, which, as the door is being raised, keeps pressing against Vthe fixed plates 3 ensuringthe gas-tightness of the closure ofv the Vchannel 1. There ,is a certain play between said slot 8 and the plate S; therefore a packing box 9 is provided atV the lower part of the slot 8 (Fig. 8) the purpose of which is to allow thepassage of theplate but to avoid that of the movable material iilling ,the channel 1 which might, were'not sucha packing box provided, ilow into the interstice. Said packing box may comprise arubber plate 10 throughY which the plate 5 can passrwith a very small play which does not allow the movablematerial to ow through; said rubber plate 10 is laterally movable in its housing 11;V owing to said packing 9 th'e slidable plate 5' is slidablein accordance with the displacements of the door, constantly ensuring permanent longitudinal closure of the vertical channel 1, which can thus permanently contain a movable material cooperating in the permanent gas-tightness along thev slateral`vertical parts of the door.

In the same way as the vertical channels 1 of the fixed device ensuring the'gas-tight'ness can be filled up with a movable material, the aperture of the oven can be provided at top and bottom, with upperjand lower horizontal channels 12 and I3 (Figs. 4, .6, 7 and 9) with joining channels 14 connecting the upper yhorizontal channel 12 to the upper part ofzthe'vertical channelsv 1 ensuring gas-tightness. Owing to the fact thatV these various channels, which'are also illed with a movable material are permanently connectedV at their extremities, a permanent, endless chain of movable material isv thus formed about the aperture of the oven.

The movable gas-tightening device integral with the door 6 also comprises at its upper part a plate 15 adapted tov penetrate into the upper horizontalv channels 12 and the connecting one 14, and` at its lower part, a plate 16 adapted to penetrate into the lower horizontal-.channel 13' defined by walls 17 extending across in front of the oven between the walls 2. When the door 6 slides down to its closing position, the upper penetrating plate Vrpenetrates into the upper horizontal channel 12 and the connecting channels 14 and alsov intoV the high parts of theV vertical lateral channels `1 and1 ensures tightness by penetrating into'the movable: material contained in said channels; inv the same way, at the lower' partA of the door 6, ythe 'lower penetrating plate 16. penetrates into the movable material that is in the vlower horizontal channel 13; thus the desired gas-tightness is automatical- 1y obtained as soon as the iixed and the movable parts of the gas-,tightening device are connected.

Y The above arrangements are given by Vway of examy Y ple only: the shapes, sizes, details of structure and usesr can vbe changed without departing from' the characteristics of lthe invention. Y

The movable material used maybe Vsand, plaster,

In some cases, the horizontal channels can be ll'ed With liquids, such as high combustion point oils, while the vertical channels are filled withmaterials insoluble in the 'liquids used; or screens, whether plastic or not, can also beplaced in the connecting channels in order ,toi separate these materials of dilerent kinds. By so doing, a permanent endless chain is obtained about the aperture of the oven, said chain being formed of a pasty material in the vertical channels and of a pasty or liquid material in the horizontalv channels, whereby a hermetical'instantaneous closing of the door of the oven 'is provided. In someY embodiments of they gas-tightening device, the vertical channels can be partly or completely suppressed and be replaced by a form the extremity ofwhich, exible or not, ensures a longitudinal contact withthe sliding plate in a groove full with grease. The above processes and devices can be applied to any aperture that must be tightly closed.

. Y 4' What I claim is: 1.` A sealing device for oven openings provided with vertically moving doors, comprising an oven having con-.

'Y said oven opening, vertical closing members extending below said door with respect to its opening direction and slidably positioned across the mouth of the vertical portions o f said channels incloseI contactwith said plates in all vertical positions yof said door for hermetically closing said vertical channels and said door having closing members for hermetically closing thenremaining portions of said channels in the closed position of said door only.

2. A sealing device for oven openings provided with vertically moving doors, comprising an oven having vertical channelsy on either side of its entrance opening, closing means extending across the bottom offeach of said channels, permanent chains of tightening materials positioned inside said channels, spaced apart xed plates Y partly closing the open front part of saidchannels, said oven having further channels joined to said vertical channels so as to completely surround said oven entrance opening, a permanent chain of tightening materials positioned vin said further channels, a door slidably mounted for vertical movement on said oven, vertical closing members vextending below said door with respect Y between said plates and the channels therebehind and said door having closing members hermetically closing said further channels in the closed position of said, door only.

V3.v AV sealing device for oven openings provided with vertically moving doors', comprising an oven having vertical channels on either side of its entrance opening, closing means extending' across the bottom of each of said channels, permanent chains of tightening materials positioned inside said channels, spaced apart iixed plates partly closing the op'en front part of said channels, said `oven having "further channels 'joined to said vertical channels so asl to completely surround said oven opening, a permanent chain of tightening materials positioned in said further channels, a door slidably mounted on.said oven for vertical movementfor opening and closing said opening, vertical plates extending'below said door with respect to its opening direction and in close frictional relation with said fixed platesy in all vertical positions of said'V door for closing the space between said xed plates, and said door havingV closing parts hermetically closing .said further channels only in the closed position of said door." v K 4. A sealing .device for oven entrance openings provided with vertically moving doors, comprising an oven having-vertical channels on either side of its entrance opening, closing means extending across the bottomof each of said channels, permanent chains of tightening materialsk positioned' inside said channels, spaced apart iixed plates partly closing the open front part of said channels, saidvoven having further channels joined to said vertical channels so as to completely surround said oven opening, a permanent chain of tightening materials positioned in said Vfurther channels, a door slidably mounted on said oven for verticalmoyement for opening j therethrough and said door having' closing parts hermetically closing said further channels in the closed position of said door only.

5. A sealing device for oven entrance openings provided with vertically moving doors, comprising an ovenL having vertical channels on either side of its entrance opening, means providing a bottom for each oi said channels, permanent chains of tightening materials positioned inside said channels, spaced apart fixed plates partly closing the open front part of said channels, said oven having further channels joined to said vertical channels so as to completely surround said oven opening, a permanent chain of tightening materials positioned in said further channels, a door slidably mounted on said oven for vertical movement and for opening and closing said opening, vertical plates extending below said door with respect to its opening direction and in close frictional relation with said fixed plates in all vertical positions of said door for closing the space between said fixed plates and plates carried by said door forming closing members and capable of penetrating into said tightening material contained in said further channels in the closed position of said door only.

6. A sealing device for oven entrance openings provided With vertically moving doors comprising an oven having channels surrounding in a continuous manner the entrance opening of said oven, a permanent chain of a movable tightening material positioned in said channels, spaced apart xed plates partly closing the open front part of said channels, a door slidably mounted on said oven for vertical movement and for closing said opening, vertical closing members extending below said door with respect to its opening direction and extending across the mouths of the vertical portions of said channels in close contact with said plates in all vertical positions of said door for hermetically closing said channel mouths and said door having closing members for hermetically closing the remaining portions of said channels in the closed position of said door only.

7. A sealing device for oven entrance openings provided with vertically moving doors comprising an oven having channels surrounding in a continuous manner its entrance opening, a permanent chain of a movable tightening material positioned in vertical portions of said channels, a pasty tightening material positioned in the remaining portions of said channels, spaced apart fixed plates partly closing the open front part of said channels, a vertically slidable door mounted on said oven for closing said opening, vertical closing members extending below said door with respect to its opening direction and slidably positioned across the mouth of the vertical portions of said channels in close contact with said plates in all vertical positions of said door for hermetically closing said vertical channel mouths and said door having closing members for hermetically closing the remaining portions of said channels in the closed position of said door only.

8. A sealing device for oven entrance openings provided with vertically moving doors comprising an oven having channels surrounding in a continuous manner its entrance opening, a permanent chain of a movable tightening material positioned in the vertical portions of said channels, a liquid tightening material positioned in the remaining portions oi said channels, spaced apart xed plates partly closing the open front part of said channels, a vertically slidable door mounted on said oven for opening and closing said opening, vertical closing members extending below said door with respect to its opening direction and extending across the mouths of the vertical portions of said channels in close contact with said plates in all vertical positions of said door for hermetically closing said channel mouths said door having closing members for hermetically closing the remaining portions of said channels in the closed position of said door only.

9. A sealing device for oven openings provided with vertically moving doors comprising an oven having channels surrounding in a continuous manner its entrance opening, a permanent chain of a pasty tightening material positioned in the vertical portions of said channels, a pasty tightening material positioned in the remaining portions of said channels, spaced apart viixed plates partly closing the open front part of said channels, a vertically slidable door mounted on said oven for closing said opening, vertical closing members extending below said door with respect to its opening direction across the mouths of the vertical portions of said channels in close contact with said plates in all vertical positions of said door for hermetically closing said channel mouths and said door having closing members for hermetically closing the remaining portions of said channels in the closed position of said door only.

l0. A sealing device for oven openings provided with vertically moving doors comprising an oven having channels surrounding in a continuous manner its e11- trance opening, a permanent chain of a pasty tightening material lling the vertical portions of said channels, a liquid tightening material filling the remaining portions of said channels, spaced apart flxed plates partly closing the open front part of said channels, a door slidably mounted on said oven for vertical movement and for opening and closing said opening, vertical closing members extending below said door with respect to its opening direction and across the mouths the Vertical portions of said channels in close contact with said plates for hermetically closing said channel mouths in all vertical positions of said door and said door having closing elements for hermetically closing the remaining portions of said channels when said door is in its closed position only.

References Cited in the tile of this patent UNTTED STATES PATENTS 729,026 West May 26, 1903 831,239 Petri Sept. 18, 1906 l,126,080 Quigley Jan. 26, 1915 1,646,325 Strassmann Oct. 18, 1927 2,003,154 Menough May 28, 1935 2,199,182 Leonard Apr. 30, 1940 2,254,900 Lessmann Sept. 2, 1941 FOREIGN PATENTS 5,781 Great Britain Nov. 27, 1902 318,328 Germany Jan. 23, 1920 422,182 Great Britain Apr. 3, 1933 

